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US 12,201,405 B2Granted
Assessing effectiveness of CPR
AssigneesFlashback Technologies, Inc., The Regents of the University of Colorado, a body corporate
InventorsIsobel Jane Mulligan, Gregory Zlatko Grudic, Steven L. Moulton
Life of this patent
Estimating the term…
Abstract
Novel tools and techniques are provided for assessing, predicting and/or effectiveness of cardiopulmonary resuscitation (“CPR”), in some cases, noninvasively. In various embodiments, tools and techniques are provided for implementing rapid estimation of a patient's compensatory reserve index (“CRI”) before, during, and after CPR is performed, and using the CRI and variations in CRI values to determine, in some instances, in real-time, the effectiveness of CPR that is performed.
Claims35
A method for non-invasively determining the effectiveness of cardiopulmonary resuscitation (CPR) on a patient, comprising:
- retrieving, by one or more computer systems, physiological data of the patient from one or more sensors monitoring the patient during CPR, wherein the physiological data is waveform data;
- transforming, by one or more computer systems, the physiological data from waveform data to one or more patient compensatory serve index (“CRI”) values thereby transforming the waveform data to a numerical value, wherein transforming the physiological data to the one or more patient CRI values includes:
- accessing a data store and acquiring a plurality of reference waveforms from a model, wherein each waveform of the plurality of reference waveforms corresponds to a respective CRI value determined from a ratio of intravascular volume loss at time t and intravascular volume loss at hemodynamic decompensation;
- comparing the patient waveform data against the plurality of reference waveforms of the model;
- determining a similarity between patient waveform data and the plurality of reference waveforms of the model individually;
- and
- determining the one or more patient CRI values that corresponds to the patient waveform data based at least in part on respective similarities of the patient waveform data to each of the plurality of reference waveforms of the model;
- based at least in part on the one or more patient CRI values, estimating, by one or more computer systems, an effectiveness of CPR on the patient, wherein the one or more patient CRI values are compared against a CRI model configured to relate changes in CRI values to the effectiveness of CPR on the patient;
- and
- displaying, by one or more computer systems, the effectiveness of CPR on the patient on a user interface.
7 more elements
A system for non-invasively assessing the health of a patient, comprising:
- one or more sensors to obtain physiological data from the patient;
- and
- a computer system in communication with the one or more sensors, the computer system comprising:
- one or more processors;
- and
- a non-transitory computer readable medium in communication with the one or more processors, the computer readable medium having encoded thereon a set of instructions executable by the one or more processors to cause the computer system to:
- retrieve physiological data of the patient from one or more sensors monitoring the patient, wherein the physiological data is waveform data;
- transform the physiological data from waveform data to one or more patient compensatory reserve index (“CRI”) values thereby transforming the waveform data to a numerical value, wherein transforming the physiological data to the one or more patient CRI values includes:
- accessing a data store and acquiring a plurality of reference waveforms from a model, wherein each waveform of the plurality of reference waveforms corresponds to a respective CRI value determined from a ratio of intravascular volume loss at time t and intravascular volume loss at hemodynamic decompensation;
- comparing the patient waveform data against the plurality of reference waveforms of the model;
- determining a similarity between patient waveform data and the plurality of reference waveforms of the model individually;
- and
- determining the one or more patient CRI values that corresponds to the patient waveform data based at least in part on respective similarities of the patient waveform data to each of the plurality of reference waveforms of the model;
- based at least in part on the one or more patient CRI values, estimate the health of the patient, wherein the one or more patient CRI values are compared against a CRI model configured to relate changes in CRI values to the health of the patient;
- and
- display the health of the patient on a user interface.
13 more elements
A system for non-invasively determining the effectiveness of cardiopulmonary resuscitation (CPR) on a patient, comprising:
- one or more sensors to obtain physiological data from the patient;
- and
- a computer system in communication with the one or more sensors, the computer system comprising:
- one or more processors;
- and
- a non-transitory computer readable medium in communication with the one or more processors, the computer readable medium having encoded thereon a set of instructions executable by the one or more processors to cause the computer system to:
- retrieve physiological data of the patient from one or more sensors monitoring the patient during CPR, wherein the physiological data is waveform data;
- transform the physiological data from waveform data to one or more patient compensatory reserve index (“CRI”) values thereby transforming the waveform data to a numerical value, wherein transforming the physiological data to the one or more patient CRI values includes:
- accessing a data store and acquiring a plurality of reference waveforms from a model, wherein each waveform of the plurality of reference waveforms corresponds to a respective CRI value determined from a ratio of intravascular volume loss at time t and intravascular volume loss at hemodynamic decompensation;
- comparing the patient waveform data against the plurality of reference waveforms of the model;
- determining a similarity between patient waveform data and the plurality of reference waveforms of the model individually;
- and
- determining the one or more patient CRI values that corresponds to the patient waveform data based at least in part on respective similarities of the patient waveform data to each of the plurality of reference waveforms of the model;
- based at least in part on the one or more patient CRI values, estimate an effectiveness of CPR on the patient, wherein the one or more patient CRI values are compared against a CRI model configured to relate changes in CRI values to the effectiveness of CPR on the patient;
- and
- display the effectiveness of CPR on the patient on a user interface.
13 more elements
Dependencies are inferred from the claim text.